Place the following list in order of occurrence from oldest to most recent: 1)appearance of the first oceans on Earth,
2) the Big Bang,
3) contraction of the solar nebula,
4) outgassing of Earth's secondary atmosphere,
5) stellar ignition in our sun,
6) build-up of oxygen in Earth's atmosphere,
7) evolution of photosynthesis.

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.